'\" t
.\"     Title: limits
.\"    Author: Luca Berra
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 22/07/2021
.\"    Manual: Formati di file e conversioni
.\"    Source: shadow-utils 4.9
.\"  Language: Italian
.\"
.TH "LIMITS" "5" "22/07/2021" "shadow\-utils 4\&.9" "Formati di file e conversioni"
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.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
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.\" * set default formatting
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.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
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.\" * MAIN CONTENT STARTS HERE *
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.SH "NOME"
limits \- definizione dei limiti di risorsa
.SH "DESCRIZIONE"
.PP
The
\fIlimits\fR
file (/etc/limits
by default or LIMITS_FILE defined
config\&.h) describes the resource limits you wish to impose\&. It should be owned by root and readable by root account only\&.
.PP
In maniera predefinita non c\*(Aq\(`e nessun limite alla quota di \(Foroot\(Fc\&. In effetti non c\*(Aq\(`e nessun modo per imporre una quota massima tramite questa procedura agli account equivalenti a root (cio\(`e tutti quelli con UID 0)\&.
.PP
Ogni riga descrive un limite per l\*(Aqutente in questo formato:
.PP
\fIutente TESTO_LIMITE\fR
.PP
oppure nel formato:
.PP
\fI@gruppo TESTO_LIMITE\fR
.PP
The
\fILIMITS_STRING\fR
is a string of a concatenated list of resource limits\&. Each limit consists of a letter identifier followed by a numerical limit\&.
.PP
Gli identificatori validi sono:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
A: spazio massimo di indirizzamento (kB)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
C: dimensione massima dei file \(Focore\(Fc (kB)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
D: spazio massimo per i dati (kB)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
F: maximum file size (KB)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
K: file creation mask, set by
\fBumask\fR(2)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
I: massimo valore di \(Fonice\(Fc (0\&.\&.39 che viene tradotto in 20\&.\&.\-19)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
L: massimo numero di accessi per questo utente
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
M: massima quantit\(`a di memoria bloccata (della quale non si pu\(`o fare \(Foswap\(Fc) (kB)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
N: numero massimo di file aperti
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
O: massima priorit\(`a \(Foreal time\(Fc
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
P: process priority, set by
\fBsetpriority\fR(2)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
R: massimo \(Foresident set size\(Fc (kB)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
S: dimensione massima della pila (kB)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
T: quantit\(`a massima di tempo CPU (MIN)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
U: massimo numero di processi
.RE
.PP
For example,
\fIL2D2048N5\fR
is a valid
\fILIMITS_STRING\fR\&. For reading convenience, the following entries are equivalent:
.sp
.if n \{\
.RS 4
.\}
.nf
      username L2D2048N5
      username L2 D2048 N5
    
.fi
.if n \{\
.RE
.\}
.PP
Be aware that after
\fIusername\fR
the rest of the line is considered a limit string, thus comments are not allowed\&. An invalid limits string will be rejected (not considered) by the
\fBlogin\fR
program\&.
.PP
The default entry is denoted by username "\fI*\fR"\&. If you have multiple
\fIdefault\fR
entries in your
\fILIMITS_FILE\fR, then the last one will be used as the default entry\&.
.PP
The limits specified in the form "\fI@group\fR" apply to the members of the specified
\fIgroup\fR\&.
.PP
If more than one line with limits for a user exist, only the first line for this user will be considered\&.
.PP
If no lines are specified for a user, the last
\fI@group\fR
line matching a group whose the user is a member of will be considered, or the last line with default limits if no groups contain the user\&.
.PP
To completely disable limits for a user, a single dash "\fI\-\fR" will do\&.
.PP
To disable a limit for a user, a single dash "\fI\-\fR" can be used instead of the numerical value for this limit\&.
.PP
Notare inoltre che tutte queste impostazioni sono effettuate ad ogni accesso\&. Non si tratta di impostazioni globali n\('e permanenti\&. Forse limiti globali saranno possibili in futuro, ma per ora devono bastare questi ;)
.SH "FILE"
.PP
/etc/limits
.RS 4
.RE
.SH "VEDERE ANCHE"
.PP
\fBlogin\fR(1),
\fBsetpriority\fR(2),
\fBsetrlimit\fR(2)\&.
